Abstract: The invention relates to an optical device for focusing a substantially elliptical laser beam comprising: means for collimating a substantially elliptical laser beam so to generate a collimated beam of substantially elliptical profile; means for circularizing the collimated beam so to generate a beam of substantially circularized profile; and means for focusing the circularized beam. The device according to the invention allows on one side to achieve better results in terms of increasing the depth of focus and overall efficiency of the system, and on the other side to allow reading of optical codes also when these are tilted with respect to the scan direction of an angle up to 45° (tilt angle).

Abstract: The invention relates to an optical device for focusing a substantially elliptical laser beam comprising:

Abstract: An optical code scanning reader comprising laser beam generating elements focused at different distances from an optical receiver element having an optical axis and a photoreceiver element having a preselected photosensitive area; the laser beams travel along a minimum of two different optical paths in the reader and at least one of the two optical paths is offset in respect to the optical axis; the value of the offset (Ho) is preselected in such a way that the quantity of light diffused by the code which reaches the photosensitive area for each beam attains a preselected value.